That friend you have who hates musicals – probably male, probably straight, probably not seen one since The Sound of Music on BBC 1 after the Queen’s Speech in 1978 – well, don’t send them to Charing Cross Theatre for this show. But that other friend you have – enjoyed Hamilton, likes a bit of Sondheim, seen a couple of operas – do send them.

Mezzo-soprano Helen Charlston just gets better and better, both as singer and as actor. Last night’s recital at Temple Church had an unusual and wide-ranging programme – consisting of a first half hopping through the centuries, followed by a complete performance of Schumann’s “Kerner-Lieder” cycle.

Peerless among the constellation of Irish singers making waves around the world, mezzo Paula Murrihy first dazzled London as Ascanio in Terry Gilliam’s English National Opera production of Berlioz’s Benvenuto Cellini. Since then she’s become a major star on the continent, not least as a superb Octavian in Strauss's Der Rosenkavalier, less so in the UK, though that should have changed with her Proms appearance last year as Didon in Les Troyens.

It’s what you dream of in opera but don’t often get: singers feeling free and liberated to give their best after weeks of preparation with a master conductor. Glyndebourne Music Director Robin Ticciati leads the way with a peerless London Philharmonic Orchestra in Bizet’s absolute masterpiece, and Tunisian-Canadian mezzo Rihab Chaieb’s Carmen stuns in a vocally magnificent cast.

While it is an incontrovertibly good thing that the classical music world has set about rediscovering the work of neglected female composers, not all rediscoveries are equally worthy of being found. Particularly on a day like International Women’s Day (IWD), concert programmers run the risk of unearthing work that tends towards the mediocre, and which can end up being tokenistic.

Some lockdown-era recital programmes have doled out miserly short measures, as performers gallop through a brief, rushed hour (or less) of music as if afraid to tax the online patience of their disembodied audience.

Solitude, mortality and transcendence have never been more profoundly expressed in music than by Mahler, who composed Das Lied von der Erde (The Song of the Earth) in the valley of the shadow of death (too superstitious to give it the name of Ninth Symphony, though that and a sketched-out Tenth did follow, he never lived to hear it performed).

What a jolting coincidence that one of the 20th century's angriest symphonic beasts should have a rare unleashing on a night of high national anxiety. Whether Vaughan Williams spewed forth his Fourth Symphony in response to darkening European clouds in 1934 or as a sublimation of sexual frustration, given his unhappy domestic life at the time, it hit us all hard last night.

The conductor Thomas Søndergård turned 50 on Friday.

It seems an almost indecent luxury to have heard two top mezzos in just over a week with so much to express, backed up by the perfect technique and instrument with which to do so. Georgian Anita Rachvelishvili with Pappano and the Royal Opera Orchestra the Friday before last only had to hold the spell through a Rachmaninov sequence in the middle of an all-Russian concert.